Real World article
(written from a Production point of view)

With the Discovery's spore drive taking them into the mirror universe and Lieutenant Stamets completely incapacitated, the crew discovers the horrors of the Terran Empire and must masquerade as their counterparts to find a way home. Lieutenant Tyler discovers there may be more to his post-traumatic stress disorder than just remembering torture at the hands of the Klingons.

Summary Edit

Gabriel Lorca, Michael Burnham and Saru in Discovery's engineering

Burnham, Saru, and Lorca in engineering

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Teaser Edit

Act One Edit

Act Two Edit

Act Three Edit

Act Four Edit

Memorable quotes Edit

"(In Klingonese) Whom do we seek?"
"How do we find him?"
"Give us light to see."
"Will he hide from us always?"

- L'Rell and Ash Tyler

"Well, let's not keep these assholes waiting. Too much?"
"No, not here. Here, it's just right."

- Tilly, attempting to adapt to the mirror universe, with Lorca's response

Log entries Edit

Background information Edit

Production Edit

Continuity Edit

  • L'Rell attempts to use a Klingon prayer to reawaken Ash Tyler's memories of Voq. This prayer was previously used in "Battle at the Binary Stars" where it was recited by Voq and T'Kuvma shortly before the latter's death.
  • It is established that the ship might have entered a different universe through detecting a quantum signature, the dialog closely mirroring a similar scene in "Parallels". This is also the first explicit hint that the mirror universe is of the same nature as the infinite quantum realities of that episode.
  • The Vulcans or a faction of them are shown to be once more in rebellion against the Terran Empire, a century after the mirror Hoshi Sato used the USS Defiant to become Empress of the Terran Empire in January 2155. In "Mirror, Mirror", Mirror Spock is depicted as serving as XO and science officer of the ISS Enterprise in 2267, under the mirror universe version of Captain Kirk.
  • The ISS Shenzhou and ISS Discovery are shown not to have their doors marked with the emblem of the Terran Empire anywhere aboard, unlike either ISS Enterprise or the ISS Avenger. Although the emblem doesn't appear on the doors of the ships, it is shown emblazoned on the floor of the ISS Discovery bridge.
  • The emblem of the Terran Empire is shown in a different design than previously shown in both "Mirror, Mirror" and the "In A Mirror, Darkly" two-parter. Curiously, the Earth itself is mirrored in the emblem, which was not previously the case.
  • Chronologically, this is the earliest reference to the Klingons of the mirror universe.
  • Tilly being captain in an alternate universe was foreshadowed in "Si Vis Pacem, Para Bellum", when an increasingly confused Stamets addresses her by that rank.
  • Lorca adopting a Scottish accent as the ISS Discovery's engineer references Montgomery Scott. Some have taken this to mean Lorca probably either knew or knew of Scott by the time this episode is set. [2] (At this point in time, Scott had been in Starfleet for about fifteen years.)
  • Burnham impersonating her mirror counterpart (who is presumed dead) is reminiscent of Benjamin Sisko having to impersonate his presumed dead counterpart in DS9: "Through the Looking Glass".
  • This is the first time that a ship is seen impersonating its mirror universe counterpart with the USS Discovery having its hull remarked to read ISS Discovery and other Imperial Starfleet hull markings to appear as its double.

Reception Edit

  • At the Continuing Voyage Tour convention in Chicago on 16 September 2017, Jonathan Frakes revealed that Star Trek: Discovery would be doing a mirror universe episode. [3] [4]
  • CBS All Access is promoting this episode as the start of "Chapter Two", due to premiere eight weeks after the previous episode, which was promoted as the end of "Chapter One". While previous series often had periods which did not see a new first-run episode being broadcast (usually rerunning earlier episodes in the interim), particularly when in syndication, this is the first explicit broadcast break in a Star Trek series, making this the first mid-season premiere in Star Trek history.

Production history Edit

Links and references Edit

Starring Edit


Guest starring Edit

Co-starring Edit

Uncredited co-stars Edit

Stunt double Edit

Stand-in Edit

References Edit

50 Kills; 100 Kills; 20th century; accent; adrenals; agony booth; Andorian; Battle of the Binary Stars; black alert; brainwashing; Bridge Crew; Burnham, Michael; Buran, ISS; chondroblast-cell scan; Constitution-class; Cooper, ISS; Cooper, USS; coup; Crestian flu; cultivation bay; data chip; data core; dinner; Discovery, ISS; Defiant, USS; Elpha; emperor; evasive maneuvers; fascism; femur; First Officer; galactic center; Galactic Time; Gotthelf; Imperial Starfleet Academy; Isik; Klingon raider; laser cannon; lateral vector transporter; Lorca, Gabriel; lunch; Manchurian test; marrow-diminution procedure; Master of Poisons; mirror universe; moisture level; mycelial network; neurological disregulation; omelet; Organia; pad thai; personality engram; Porathia; PTSD; pulled pork; Purmata VI; Quam; quantum reality; quantum signature; radius; racism; random memory sampling; relative humidity; Sarcophagus; Sector 006; Shenzhou, ISS; Sorna Prime; spice; spinal cord; spore drive; spore germination rate; Starbase 46; Starfleet; Starfleet Medical Center; Starfleet; Terran Empire; Terran Empire rebellion; Tilly, Sylvia; Valor; Vulcan; Vulcan cruiser; witch; worker bee; Wurna Minor; xenophobia; yellow alert

Menu references Edit

bacon; beef stew; beef with mushrooms; breakfast; chicken; chicken stew; chocolate cake; coconut crisp; egg; fish and chips; fruit; ham; ham schnitzel; ice cream; lasagna; salad; soup; steak; vegetable; yogurt

ISS Discovery dedication plaque Edit

External links Edit

Previous episode:
"Into the Forest I Go"
Star Trek: Discovery
Season 1
Next episode:
"The Wolf Inside"